This game is super fun and gorgeous. Loved the soundtrack and the clever mechanic, and how it evolved as the game went on.
I think in the early stages it would be nice to see a little bit further ahead, because I had trouble getting used to the shadow person at first. And the shadow person dying could be a bit more satisfying, like some sort of particle explosion instead of just disappearing.
But other than those two nitpicks, a fantastic experience! Short and sweet.